diff --git a/browser/websocket/_fetch.ts b/browser/websocket/_fetch.ts
index e722e5c..94f5f49 100644
--- a/browser/websocket/_fetch.ts
+++ b/browser/websocket/_fetch.ts
@@ -1,10 +1,15 @@
 import {
   Change,
   CommitNotification,
-  Delete,
-  Pin,
+  DeletePageChange,
+  PageCommitError,
+  PageCommitResponse,
+  PinChange,
   ProjectUpdatesStreamCommit,
   ProjectUpdatesStreamEvent,
+  Result,
+  TimeoutError,
+  UnexpectedError,
   wrap,
 } from "../../deps/socket.ts";
 import { pull } from "./pull.ts";
@@ -22,28 +27,37 @@ export type PushCommitInit = {
   userId: string;
 };
 
-export const pushCommit = async (
+export const pushCommit = (
   request: RequestFunc,
-  changes: Change[] | [Delete] | [Pin],
+  changes: Change[] | [DeletePageChange] | [PinChange],
   commitInit: PushCommitInit,
-) => {
-  if (changes.length === 0) return { commitId: commitInit.parentId };
-  const res = await request("socket.io-request", {
-    method: "commit",
-    data: {
-      kind: "page",
-      ...commitInit,
-      changes,
-      cursor: null,
-      freeze: true,
-    },
-  });
-  return res as { commitId: string };
-};
+): Promise<
+  Result<
+    PageCommitResponse,
+    UnexpectedError | TimeoutError | PageCommitError
+  >
+> =>
+  changes.length === 0
+    ? Promise.resolve({ ok: true, value: { commitId: commitInit.parentId } })
+    : request("socket.io-request", {
+      method: "commit",
+      data: {
+        kind: "page",
+        ...commitInit,
+        changes,
+        cursor: null,
+        freeze: true,
+      },
+    }) as Promise<
+      Result<
+        PageCommitResponse,
+        UnexpectedError | TimeoutError | PageCommitError
+      >
+    >;
 
 export const pushWithRetry = async (
   request: RequestFunc,
-  changes: Change[] | [Delete] | [Pin],
+  changes: Change[] | [DeletePageChange] | [PinChange],
   { project, title, retry = 3, parentId, ...commitInit }:
     & PushCommitInit
     & {
@@ -57,8 +71,9 @@ export const pushWithRetry = async (
       parentId,
       ...commitInit,
     });
-    parentId = res.commitId;
-  } catch (_e) {
+    if (!res.ok) throw Error("Faild to push a commit");
+    parentId = res.value.commitId;
+  } catch (_) {
     console.log("Faild to push a commit. Retry after pulling new commits");
     for (let i = 0; i < retry; i++) {
       const { commitId } = await pull(project, title);
@@ -68,10 +83,11 @@ export const pushWithRetry = async (
           parentId,
           ...commitInit,
         });
-        parentId = res.commitId;
+        if (!res.ok) throw Error("Faild to push a commit");
+        parentId = res.value.commitId;
         console.log("Success in retrying");
         break;
-      } catch (_e) {
+      } catch (_) {
         continue;
       }
     }
diff --git a/browser/websocket/diffToChanges.ts b/browser/websocket/diffToChanges.ts
index b4c02f3..c5bd1b2 100644
--- a/browser/websocket/diffToChanges.ts
+++ b/browser/websocket/diffToChanges.ts
@@ -1,9 +1,9 @@
 import { diff, toExtendedChanges } from "../../deps/onp.ts";
 import type { Line } from "../../deps/scrapbox.ts";
 import type {
-  DeleteCommit,
-  InsertCommit,
-  UpdateCommit,
+  DeleteChange,
+  InsertChange,
+  UpdateChange,
 } from "../../deps/socket.ts";
 import { createNewLineId } from "./id.ts";
 
@@ -14,7 +14,7 @@ export function* diffToChanges(
   left: Pick<Line, "text" | "id">[],
   right: string[],
   { userId }: Options,
-): Generator<DeleteCommit | InsertCommit | UpdateCommit, void, unknown> {
+): Generator<DeleteChange | InsertChange | UpdateChange, void, unknown> {
   const { buildSES } = diff(
     left.map(({ text }) => text),
     right,
diff --git a/browser/websocket/updateCodeBlock.ts b/browser/websocket/updateCodeBlock.ts
index fab7791..d51ec23 100644
--- a/browser/websocket/updateCodeBlock.ts
+++ b/browser/websocket/updateCodeBlock.ts
@@ -1,10 +1,10 @@
 import { Line } from "../../deps/scrapbox-rest.ts";
 import {
-  DeleteCommit,
-  InsertCommit,
+  DeleteChange,
+  InsertChange,
   Socket,
   socketIO,
-  UpdateCommit,
+  UpdateChange,
 } from "../../deps/socket.ts";
 import { TinyCodeBlock } from "../../rest/getCodeBlocks.ts";
 import { diffToChanges } from "./diffToChanges.ts";
@@ -91,9 +91,9 @@ const getCodeBody = (code: string | string[] | SimpleCodeFile): string[] => {
 
 /** insertコミットの行IDとtextのインデントを修正する */
 function* fixCommits(
-  commits: readonly (DeleteCommit | InsertCommit | UpdateCommit)[],
+  commits: readonly (DeleteChange | InsertChange | UpdateChange)[],
   target: TinyCodeBlock,
-): Generator<DeleteCommit | InsertCommit | UpdateCommit, void, unknown> {
+): Generator<DeleteChange | InsertChange | UpdateChange, void, unknown> {
   const { nextLine } = target;
   const indent = " ".repeat(countBodyIndent(target));
   for (const commit of commits) {
@@ -136,7 +136,7 @@ function* fixCommits(
 const makeTitleChangeCommit = (
   code: SimpleCodeFile,
   target: Pick<TinyCodeBlock, "titleLine">,
-): UpdateCommit | null => {
+): UpdateChange | null => {
   const lineId = target.titleLine.id;
   const targetTitle = extractFromCodeTitle(target.titleLine.text);
   if (
diff --git a/browser/websocket/updateCodeFile.ts b/browser/websocket/updateCodeFile.ts
index edad586..f092e8e 100644
--- a/browser/websocket/updateCodeFile.ts
+++ b/browser/websocket/updateCodeFile.ts
@@ -1,10 +1,10 @@
 import type { Line } from "../../deps/scrapbox-rest.ts";
 import {
-  DeleteCommit,
-  InsertCommit,
+  DeleteChange,
+  InsertChange,
   Socket,
   socketIO,
-  UpdateCommit,
+  UpdateChange,
 } from "../../deps/socket.ts";
 import { getCodeBlocks, TinyCodeBlock } from "../../rest/getCodeBlocks.ts";
 import { pull } from "./pull.ts";
@@ -130,7 +130,7 @@ function* makeCommits(
       UpdateCodeFileOptions["isInsertEmptyLineInTail"]
     >;
   },
-): Generator<DeleteCommit | InsertCommit | UpdateCommit, void, unknown> {
+): Generator<DeleteChange | InsertChange | UpdateChange, void, unknown> {
   function makeIndent(codeBlock: Pick<TinyCodeBlock, "titleLine">): string {
     return " ".repeat(countBodyIndent(codeBlock));
   }
diff --git a/deps/socket.ts b/deps/socket.ts
index 8d4e7c2..3897e3f 100644
--- a/deps/socket.ts
+++ b/deps/socket.ts
@@ -1,17 +1 @@
-export type {
-  Change,
-  CommitNotification,
-  Delete,
-  DeleteCommit,
-  InsertCommit,
-  ListenEventMap,
-  Pin,
-  ProjectUpdatesStreamCommit,
-  ProjectUpdatesStreamEvent,
-  Socket,
-  UpdateCommit,
-} from "https://raw.githubusercontent.com/takker99/scrapbox-userscript-websocket/0.1.6/mod.ts";
-export {
-  socketIO,
-  wrap,
-} from "https://raw.githubusercontent.com/takker99/scrapbox-userscript-websocket/0.1.6/mod.ts";
+export * from "https://raw.githubusercontent.com/takker99/scrapbox-userscript-websocket/0.2.1/mod.ts";
diff --git a/deps/testing.ts b/deps/testing.ts
index fa7558b..2e7f0ce 100644
--- a/deps/testing.ts
+++ b/deps/testing.ts
@@ -1,2 +1,2 @@
-export * from "https://deno.land/std@0.222.1/testing/asserts.ts";
-export * from "https://deno.land/std@0.222.1/testing/snapshot.ts";
+export * from "https://deno.land/std@0.223.0/testing/asserts.ts";
+export * from "https://deno.land/std@0.223.0/testing/snapshot.ts";